Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

Honeywell RedLink thermostats have different Deadbands. Why?

Why do the two Honeywell RedLink thermostats have different Auto Changeover Deadband factory settings? The THX9421R5021WW comes preset to 5°F and the TH821R1001 comes preset to 9°F. I am installing both on two air-to air heat pumps in south Florida. Heat pumps are Trane single stage heat with electric backup and single stage cool. Should I leave the Auto Changeover Deadbands at factory settings or make both the same?

Comments

  • ratioratio Member Posts: 2,545
    Are you talking about the enforced deadband between the cooling setpoint & heating setpoint. That is 3* in the 8000 series as shipped from the factory, I'm not sure about the 9000 series, but I'd guess 2 or 3*.
  • ChrisJChrisJ Member Posts: 11,180
    I'd make them both the same.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • SWEISWEI Member Posts: 7,356
    Assuming those figures really are correct, I'd suspect this could well be due to fubmlefingering somewhere by the manufacturer. 5°C = 9°F.
  • ratioratio Member Posts: 2,545
    FWIW, I just found out that if an 8321U is programmed for dehumidification by cooling droop, the deadband range changes from 3-9 to 5-9 *F.
Sign In or Register to comment.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!